post_install() {
  printf '==> An authentication agent is required\n'
  printf '    Cinnamon, Deepin, GNOME, GNOME Flashback, KDE, LXDE, LXQt, MATE and Xfce\n'
  printf '    have an authentication agent already.\n'
  printf '    See https://wiki.archlinux.org/index.php/Polkit#Authentication_agents\n'
  printf '    for other desktop environments.\n'
}
